Browsing by Author "OUADI, ABDERRAHMANE"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Improvement of Phasor Measurement Unit Performance
    (2010) OUADI, ABDERRAHMANE; Bentazi, Hamid; MAUN, JEAN CLAUDE
    Fast measurements of the instantaneous amplitude and phase angle of the fundamental components and frequency in three-phase power systems may be investigated with high accuracy through the use of modern power instruments such as Phasor Measurement Unit (PMU). However, this accuracy may be affected by several encountering power disturbances, such as abrupt frequency deviation, fast and slow dc offsets decaying due to sudden current changes, inter-harmonics, etc. To avoid these effects for improving the quality of measurements, this work presents a new method of real-time filtering for removing the unwanted DC offset and hence improving SDFT algorithm. To validate the proposed method, the performances of PMU are tested using the data generated by Simulink/MATLAB simulator. The obtained results are very encouraging
  • No Thumbnail Available
    Item
    A New Approach Applied to Adaptive Centralized Load Shedding Scheme
    (2009) Bentarzi, Hamid; OUADI, ABDERRAHMANE; GHOUT, NADIR; Maamri, Farid; MASTORAKIS, NIKOS E.
    One of major contingencies of an electric power system is due to imbalance between loads and generated power. This leads to instability in the power system and hence to a blackout. A load shedding scheme may be used to avoid such problem by reducing the total load. The aim of this work is to develop a new approach applied to an adaptive load shedding scheme using recent development technology such as wide area synchro-phasor measurement. All generator frequencies that may be measured by phasor measurement units are sent to center where a magnitude of disturbance will be calculated. These measured frequencies also will be used to determine the amount of load to be shed as well as the number of shedding steps